Reinforced-concrete pipe



G. C. ENTRAR/,

REINFORCED CONCRE PIFE APPLICATION msn ocT.25,1919.

hmmm July iT'ED STATES ers-NRT y orifice GEORGE CORRIE BARTRAM, OF MASSAPEQ, NEW YORK,

Assrenon To UNITED CONCRETE PIPE C0., OF NEW YORK, N. Y., A CORPORATION F DELAWARE.

REINFORCED-CONJCRETE IPE.

Specification of Letters Patent.

Patented July 13, 1920.

To all whom it may concern:

Be it known that l, GEORGE Comun BAR- TRAM, a citizen of the United States of America, residing at Massapequa, in the county of Nassau, Long island, New-York, have invented certain new and useful Improvements in Reinforced-Concrete Pipes, of which the following is a specification.

My invention relates toreinforced concrete constructions and particularly vto constructions in Which the reinforcement corn-Y ln certain reinforced concrete constructions such as Water and gas pipes, tunnels, reservoirs, etc., it has been proposed to use sheet metal cylinders which are embedded in the concrete and serve to seal the pipe against the' escape of liquid or gas therethrough. Under the inliuence of changes in temperature, vibration, etc., it frequently occurs, however, that the concrete becomes loosened from the metal and peels or breaks away, thus exposing the metal pipe and weakening the structure. The present invention provides means by which the concrete may be tied to the reinforcing sheet metal pipe, While .at the sametime preserving the latter imperforat'e, and thus insuring a gas and fluid-tight seal.

The invention is shown applied to a reinforced concrete pipe having a sheet metal pipe embedded in the concrete 6. At suitable intervals on both the inner and outer faces of the pipe are Welded thereto any suitable means, such as Wires 7, the free ends of which extend into the concrete and eli'ec- Vtually tie the latter to the sheet metal pipe 5. ln Fig. 3 the Wires are double ended, be-

ing welded to the pipe at their mid points 8.

pipe. only other Obviously, if tie means are needed on one face of the pipe, then those for the face may be omitted.

In the construction illustrated I have shown a mesh reinforcev), of common type, With circumferential rings or coils 10, to which the tie Wires 7 are fastened at their outer ends. means not only secure thev concrete to the p ipe but also properly maintain the position of the mesh reinforce with relation to the sheet metal pipe 5. Here again, the use of a mesh reinforce onboth the inner and outer faces of the metall pipe 5 is optional, one or the other being suflicient under certain conditions,in which case the tie Wires would extend into the concrete Without engagmg any other reinforce and having-solely the function of tying the concrete to the sheet metal pipe 5.

The Welding operation by Which the tie means are secured to the face of the pipe 5 may be of any suitable type, for example, electrical or acetylene, or the attachment of the tie means to the pipe may be otherwise accomplished so long as the pipe 5 maintains its imperforate condition.

in the following claims, the Word pipe is used in a sense broad enough to include such structures as tunnels, tanks, etc., and the Word imperforate in a sense broad enough to include a structurein which the pipe comprises plates rivetedor Welded together at their edges in a Wateror gas-tight joint. The underlying thought of the invention is to apply to the imperforate bodies of the plates, or to the imperforate Wall of a one-piece metal pipe, suitable tie means for holding the concrete While at the same time maintaining these plates or Walls free vfrom leakage apertures.

.l claim as my invention- 1. A reinforced concrete pipe having an imperforateL metal pipe embedded therein, and tie means mechanically connected 'to the face of the metal pipe and extending into the concrete to tie the latter thereto.

2. A reinforced concrete pipe having an imperforate metal pipe embedded therein, and tie means welded to the face of the pipe and extending into the concrete to tie the latter thereto;

Ain g the pipe, and is of such character that it will serve to tie :the concrete to the In this construction the tieV employed Which does not involve perforati 3. A reinforced concrete pipe having an imperforate metal pipe embedded therein, and -tie means Welded to both faces of the pipe and extending into the concrete to tie the latter thereto.

4. A reinforced concrete pipe having an imperforate metal pipe embedded therein, and tie means mechanically connectedto the face of the metal pipe and extending into the concrete to tie the latter thereto, in combination with open reinforcing elements spaced from the pipe and embedded in the concrete, said open reinforce being engaged by the tie means attached to the face of the E. A reinforced concrete pipe having an imperforate metal pipe embedded therein, and tie Wires Welded to the face of the pipe andextending into the concrete to tie the latter thereto.

v6. A reinforced' concrete pipe having an imperforate sheet metal pipe embedded therein 'and tie Wires Welded to both the inner and outer faces of the pipe and extending into the concrete to tie the latter thereto.

7 .'A reinforced concrete pipe having an imperforate sheet metal pipe embedded concrete, together With wires Welded to the face of the pipe and connected to said mesh reinforce, substantially as described.

In testimony whereof I have signed my nameto this specification.

GEORGE CORRIE BARTRAM.

therein, mesh reinforce spaced from the. sheet metal pipe, and also embedded in the 

